Logitech Wireless Headset H820eDECT spectrum wireless connectivityIn-call LED indicator light. Battery type-Lithium ion. Microphone type-Bi-directional ecmOn-boom mute button and mute indicator LED light. Frequency response: 150 Hz – 7kHzIntuitive on-ear call controls. Operating voltage 1.4 to 5.0v dcLong hours of wideband talk time. System Requirements: Windows Vista or higher,macOS 10.7 or higher,Linux,One USB 2.0 portComfortable double-ear binaural headset with enterprise-quality DECT spectrum wireless connectivity: will not interfere with wireless networksBusiness-grade audio: Wideband Audio, Digital Signal Processing (DSP) and noise-cancelling boom mic for crystal-clear conversationsBroad UC compatibility: Optimized for Microsoft Lync, Cisco compatible and compatible with most leading UC platforms which ensures enterprise-quality audio and an integrated experienceThis business product ships in brown box with no retail packaging